I have tried the EtherRegen in and out of my system in a variety of configurations. I have installed it before, after and without the ENO and although the EtherRegen does sound excellent, I am convinced that the ENO is best for my ears in my system. I know that many love the EtherRegen and I understand why, however my choice is to stick with only the ENO for now.

Nucleus Roon Server w Uptone JS-2 LPS.
818v3, 8000SE, IsoAcoustics Titan Theis.
Denafrips Arcas Streamer
Dual SVS SB17 Subs w IsoAcoustics Gaia 1.
AQ Vodka/Diamond Network/SL Cables.
Tempus network switch.
Muon-Pro network filter.
Shunyata Everest, Shunyata Omega and Sigma Power Cables. 2x CAD GC1